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<Read Me First>
IM 01W02E02-11EN
NOTE
• YFGW520 should be installed in upright position.
• YFGW520 does not have a power switch inside. Prepare a dedicated breaker for the
external power line to turn ON/OFF the device.
• Make sure that the breakers are installed in the power supply circuits located in non-
hazardous areas so that the power can be shutoff when abnormality occurs.
• Electrostatic charge may cause an explosion hazard. Avoid any actions that cause the
generation of electrostatic charge, such as rubbing with a dry cloth on the non-metalic parts
(excluding glass parts) or coated parts of product.
• Take care not to generate mechanical sparking when access to the instrument and
peripheral devices in hazardous area.
• The antenna and surge protective device provided with YFGW520 are simple apparatus in
accordance with IEC 60079-11 or EN 60079-11.
• They are passive components and their internal inductance and capacitance are
negligible regarding intrinsically safe installation.
• They do not contain any voltage and/or current-limiting devices.
•
They do not contain any means of increasing voltage or current, such as DC-DC converters.
• Surge protective device is not separated from the earth and must earthed together with
YFGW520 in accordance with IEC 60079-14 or EN 60079-14.
• Surge protective device has metallic enclosures and no risk for electrostatic discharges.
• As for the temperature class, they are classified as T4 for Ta ≤ 70°C, since the power
applied to them is ≤ 130 mW and their surface area is > 20 mm
2
.
• Lc of the provided cable is 0.21 μH/m.
• Cc of the provided cable is 83 pF/m.
